This piece takes place in a world where the SCP Foundation existed at some point but has been removed from it.
This piece was considered for the Unfounded canon, but because the Foundation did exist, it isn't part of it. It also isn't part of any canon; it's a standalone as far as I know; other shūshū-in GoI-formats have nothing to do with this universe.
So in that regard, it's more akin to SPC-1764, which works under a similar premise and is also a standalone piece.
Also, yes, this piece is rather short as it was written for an 800-or-less character tale contest. This piece was originally a tale, as it was written before JP GoI formats really existed. It became a GoI format much later.